In more sophisticated configurations, an administrator might take advantage of performance, flexibility and availability benefits by spending considerable time reorganizing the system to use LVM, software RAID, enhanced filesystem types and other advanced techniques.

In a purchase completed earlier this month, the Maryland-based NASA facility acquired an additional compute and storage solution incorporating 3 SGI Altix 3000 systems with a total of 1,024 Intel Itanium 2 processors and 2TB of global shared-memory, and the ability to store and manage another 200 trillion bytes, or terabytes (TB), of data with an SGI InfiniteStorage storage area network with the SGI InfiniteStorage shared filesystem CXFS.

Other topics in the book include: Memory management including file buffering, process swapping, and Direct Memory Access (DMA)--The Virtual Filesystem and the Second Extended Filesystem--Process creation and scheduling--Signals, interrupts, and the essential interfaces to device drivers--Timing--Synchronization in the kernel-Interprocess Communication (IPC)--Program execution The second edition of 'Understanding the Linux Kemel' will acquaint readers with all the inner workings of Linux, but is more than just an academic exercise.

This means that users can enter descriptive tags as well as timeline-based comments and annotations, and have them automatically reflected when new versions of their media files are saved to the filesystem.

Other subjects include a secure and accountable filesystem over untrusted storage, securing disk-resident data through application level encryption, and security and integrity of a distributed file storage in a virtual environment.

The chosen solution must integrate with applications that have a native backup package and ensure integrity by accessing data through applications instead of at the database, filesystem, or disk levels.

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